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<title>CodeMirror: Any Word Completion Demo</title>
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<article>
<h2>Any Word Completion Demo</h2>
<form><textarea id="code" name="code">
(function() {
  "use strict";

  var WORD = /[\w$]+/g, RANGE = 500;

  CodeMirror.registerHelper("hint", "anyword", function(editor, options) {
    var word = options && options.word || WORD;
    var range = options && options.range || RANGE;
    var cur = editor.getCursor(), curLine = editor.getLine(cur.line);
    var start = cur.ch, end = start;
    while (end < curLine.length && word.test(curLine.charAt(end))) ++end;
    while (start && word.test(curLine.charAt(start - 1))) --start;
    var curWord = start != end && curLine.slice(start, end);

    var list = [], seen = {};
    function scan(dir) {
      var line = cur.line, end = Math.min(Math.max(line + dir * range, editor.firstLine()), editor.lastLine()) + dir;
      for (; line != end; line += dir) {
        var text = editor.getLine(line), m;
        word.lastIndex = 0;
        while (m = word.exec(text)) {
          if ((!curWord || m[0].indexOf(curWord) == 0) && !seen.hasOwnProperty(m[0])) {
            seen[m[0]] = true;
            list.push(m[0]);
          }
        }
      }
    }
    scan(-1);
    scan(1);
    return {list: list, from: CodeMirror.Pos(cur.line, start), to: CodeMirror.Pos(cur.line, end)};
  });
})();
</textarea></form>

<p>Press <strong>ctrl-space</strong> to activate autocompletion. The
completion uses
the <a href="../doc/manual.html#addon_anyword-hint">anyword-hint.js</a>
module, which simply looks at nearby words in the buffer and completes
to those.</p>

    <script>
      CodeMirror.commands.autocomplete = function(cm) {
        CodeMirror.showHint(cm, CodeMirror.hint.anyword);
      }
      var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
        lineNumbers: true,
        extraKeys: {"Ctrl-Space": "autocomplete"}
      });
    </script>
  </article>
